Derrick.



No. 842,799. PATENTED JAN. 29, 1907.

I. E. MONROE.

DERRICK.

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" mf" m w I W!! UNITED STATES PATENT o IoE.

.- IsAAo ERRETT MONROE, or COMBS, WEST VIRGINIA.

DERRICK.

Specification of Letters Patent.

Patented Jan. 29, 1907.

Application filed April 28, 1906. Serial No. 314,279.

To all whom/it may'conoern:

Be it known that I, IsAAc ERRETT -MoN-' ROE, a citizen of the UnitedStates, residing at Combs, in the county of Ritchie and State of WestVirginia, have invented newend useful Improvements in Derricks, 'ofwhich the following is a specification.

This invention relates to derricks, the object of the invention being toprovide a simple, reliable, compact, and portable derrick,

especially designed for construction work,.

drilling, and operating oil-wells. I

The main object of the invention is to provide, in connection with aplurality of telesco ic extensible sections, means for bracing anstiffening the joints between the intervening ends of the severalsections when the derrick is extended, whereby the supporting capacityof the derrick is materially increased and the derrick rendered saferand more reliable in use.

tion of the derrick-head shown in one of sev-' eral forms. Fig. 6 is aview of another form of joint between the sections of the derrick.

Fig. 7 is a perspective view of another form of derrick-head.

The derrick contem lated in this invention com rises a plurality ofsections 1, 2, 3,

and 4, te escopically fitted one into another in the manner indicated inFig. 1, the lowermost section 1 being of the largest diameter,'

the next section. ofsufficiently lessdiameter to slide into the section,1, and so on, pro-' gressively, the last section 4 being the smallest ofall the setions and being equipped with a supporting-head 5, which isshown in Fig. 1 as consisting of a collar fitted upon the upper end ofthe superimposed section4 and provided with upstanding lugs 6, betweenwhich one ormore pulleys 7 are mounted on a short shaft 8, connectingthe lugs 6. If desired, the head 5 may also be provided with eyes orholes to receive guy-wires 9, as

shown in Fig. 1. In Fig. 5 the head is illusjzrated as eye 7 anlaterally-projectin pins 10 to which the guy-wires may 152 connected.

The lowermost section 1 is mounted upon asupporting-ba'se 11, which maybe of any .desired form or construction, either in the form of a hollowT, as shown in Figs. 1 and 4, or flat or of any desired shape to suitthe work for which the derrick is intended.

The oints between the intervening ends of the sections 1, 2, 3, and 4may be described,

with reference to Fig. 2, as follows: The lower section 1 is provided atits upper edge with (provided with a plurality of pulaninwardly-extending conical shoulder 12.

The lower end of the next succeeding upper section 2 is enlarged toform' a corresponding conical shoulder 13, and when the derrick isextended to its full height the shoulders 13 meet the shoulders 12 ofthe several sections. Now in order to provide for a firm on age- Irentbetween these conical or tapering s oulders 12 and 13 each section isexteriorly threaded, as shown at 14, and a split collar (shownin planview in Fig. 3) is provided,

the sans-e embodying semicircular halves or portions 15, which arethreaded upon their inner side to engagethe threads 14 of thederrick-section which the stop-collar enzbraces;

The sections 15 of the split stop-collar are provided with theoutwardly-extending lugs or ears 16, which receive clamping-bolts 17, bywhich the threads ofthe sections 15 may be forced into engageirent withthe threads 14 of the derrick-section with any desired pressure. Thethreads 14 are located immediately above the top of the next succeedinglower section, as shown inFig. 2, and in the operation of the splitclairping-collar the sections thereof are first clamped togethersufiiciently to cause the threads thereof to engage the threads 14 ofthe derrick-section: i

The stop-collar as a whole is then turned by any suitable implementaround the section with ,which it has a threaded engagement, said collarbearing against and upon the upper extreniity of the next lowerderrick-section, as clearly shown in Fig. 2. By thus turning thestop-collar the shoulder 13 1s forced upward against and in firmunyielding contact with the shoulder 12 of the next lower section,thereby providing a firm seat and rigid joint between the interfittingderrick-sections.-

The form of joint hereinabove described is carried out at each pointwhere one derrick-- section fits into another, and therefore when thederrick-is wholly-extended to its fullheight, asishown' in Fig. 1, it isjust as rigid as -if it were formed entirely in one piece. .Each

5 derrick-section, with the exception of the lowermost section 1, isprovided with a down' "wardly exten'din'g tubular stem 18,affordingcommunication betweentheseveral sections, said stem beingthreaded to receive a nut 19,"

i WlliGh--SCI6WS11P against 'a metal washer 20,

between which anda shoulder 21, formed by=- 'reducingthe end: of thesection, is placed a packing washer 22 ,of rubber-or-any suitablematerial, which forms a li uid and fluid tight. rjoint-b'etween, theinterfittmgends-of the adjoining sections'of the derrick-,ithe'nut- 19and metal washer =20- serving to compress the packing-washer 22:-transversely and; exp and a v thesame laterally :to obtain the necessaryweelose-fitof the packing-washer against the 111-":-

nersurface of the derrick-sectioninwhich it is contained. WithinQthebase 11-.is aninletslchamber-23, with whicha-fluid or liquid sup. lypipe '24 communicates, said pipe having 25 tted-thereto atiasuitable:pointxa'threeeway cock 26, by meansofiwhich liquidiomfluid; maybe admitted to the-interior'of'the dererick-section for elevating thelatter and ex haustedv therefrom through a drain-outlet opening 26in'the sideof the=three-waycock 25. In Fi 711 have illustratedanotherform of; '=de'rrick-. ead 5, in-whioh said headis providedw-ith-a crossbar or frame- 27,.equip ed 1 v:wi-thone or more pulleys -7-,- andprovided at .g5r-opposite ends with hooksi28, adapted= tosupzport-objects hoisted by the iderrick on to re-: ceive guy-wires forsteadying the-derrick when erected' -61 clai1n p1-.-.AI.-derrickembodyin -a plurality of tubular telescopic r sectionsiavin interfitting ends, COIJiCElluShOUldQFS :on; saidfiinterfittingends, and means for forcing said conical -shoulders into-firm andunyielding engagernent'with'ea'c'h other when the derrick-sec .tions areextended, substantially as described.

2. 'A derrick embodying a plurality of hollow-telescopic sections, theadjacent interfitting-endsof which are provided with the cooperatingconical shoulders, and a combined stop-collar and'clarn removably*fitted to one section and adapte 1 to engage the' adjoining section toforce the conical shoulders of theinterfitti-ng ends into firmandunyield- 'ing enga' ernentwith each-other.

errick= embodyin -a-plurality of tu- "bular'telescopie sections, t einterfitting ends of" which are provided'withcooperating conicalshoulders, a s lit I-OQHQI'I'GHI ovably: fitted on one sectionan having.a threaded engage- =menttherewith and adapted to bear against theadjoining section, thearrangenn 'ent bein such vthatby turningsaidrcollar, the conica \shouldersof the' interfitting ends are forcedinto: firm and unyielding engagement with each otherysubstantially asdescribed.

4; A derrick embodyinga plurality of tu- -bularr-telescopic sections,the'int'erfitting ends of which are providediwith cooperatingconicalshoulders, Treans for-forcing said shoulders into firm andunyielding engagement WithEGaCh Ol/hQP; a-tubular stem on the interothersection a packingwvashen extending around said stem, andmeans-fone'xpanding said washer into fluid-tight engagement withthe-inside of the last-named section.

-z1n testimony whereof I affix my signature linp'resence of twowitnesses.

- "Witnesses:

GEO.-.-RIN\EHART, S. S. DYER, Jr.

= .ISAAG ERRETT MONROE.

fitting end of one section extending into the V

